Doffing device used for textile machinery



1967 YUKRMASA MIYAG! 3,355,??4;

DOFFING DEVICE USED FOR TEXTILE MACHINERY- Filed June ll, 1965 '7 Sheets-$heet 1 ATTORNEYS 1967 YUKIMASA MIYAGI DOFFING DEVICE USED FOR TEXTILE MACHINERY '7 Sheets-Sheet 2 Filed June 11, 1965 I N VE NTOR 5%9 Uzi w ATTORNEY-S Dec. 1967 YUKIMASA MIYAGI DOFFING DEVICE USED FOR TEXTILE MACHINERY Filed June 11, 1965 V 7 Sheets-$heet 5 INVENTOR .7 am fli'ygd BY fl/jm, 7

ATTORNEYS YUKIMASA MIYAGI DOFFING DEVICE USED FOR TEXTILE MACHINERY Dec. 5, 1967 7 Sheets-Sheet 4 Filed June 11, 1965 @0223? mafia $154529; Q9 04%),

YUKiMASA MIYAGI 3,355,774

DOFFING DEVICE USED FOR TEXTILE MACHINERY Dec. 5, 1967 Filed June 11, 1965 '7 Sheets-Sheet 1967 YUKIMASA MIYAGI DOFFING DEVICE USED FOR TEXTILE MACHINERY 7 Sheets-Sheet 6 Filed June 11, 1965 zurzii I mm 11/ 5, 1967 YUKIMASA MLYAGI 3,355,774

DOFFING DEVICE USED FOR TEXTILE MACHINERY Filed June 11, 1965 7 Sheets-Sheet 7 United States Patent 3,355,774 DOFFING DEVICE USED FOR TEXTILE MACHINERY Yukimasa Miyagi, 160-4 Honoura, Gunge, Mikage-cho, Higashiuada-ku, Kobe, Japan Filed June 11, 1965, Ser. No. 463,193 Claims priority, application Japan, Mar. 28, 1963, 38/115,335 3 Claims. (Cl. 19106) This application is a continuation-in-part application of my copending application Ser. No. 337,936 filed Ian. 15, 1964, now abandoned.

The present invention relates to a dofiing device used for textile machinery wherein fibres deposited on the peripheral surface of a revolving cylinder are removed onto a drum of the device and the removed fibres automatically leave the device.

A device of this kind may be employed in such textile machinery as openers and carding engines and consists of a fibre transferring cylinder, on which the fibres stay, and a doifing drum that revolves itself keeping contact with the cylinder and that is provided with many needleshaped teeth on the surface. By means of compressed air produced by pneumatic means, the fibres are removed by the said needle-shaped teeth and are transferred to any designated place. This makes the construction rather complicated, the dofiing eifect not assured, and the readjustment of the system constantly needed.

In carding engines, a doffer comb has extensively been employed for removing the fibres deposited on a doflfer, but the doffer comb is unable to effectively do the doffing work when the peripheral speed is high because its vibrating speed cannot overtake the peripheral movement of the fibres on a doffer.

The main object of the present invention is to provide a dofl'lng device wherein the fibres deposited on a revolving cylinder are continuously removed onto a drum of the device and the removed fibres automatically leave the device without requiring any more dofiing means.

The other object of the present invention is to avoid making many teeth for dofiing purpose needle-shaped and independent of each other, and instead to make the said teeth form a plate having many sawteeth-shaped teeth, to simplify the structure of the doifing portion and get it easily built.

Another object of the present invention is to provide an outer drum which contains an inner shaft or drum that is provided with doffing teeth and which is placed eccentrically against the inner shaft or drum, so that the fibres sticking on the dofiing teeth may be easily removed, and the structure of the outer drum may be simplified and easily manufactured, namely by virtue of the outer drum having elongate slits consisting of two lateral plates and segments corresponding in numbers to the said elongate slits.

Other objects and features will become apparent upon an understanding of the illustrative embodiment about to be described, or will be indicated in the appended claims, and various advantages not described herein will occur to one skilled in the art upon employment of the invention in practice.

A preferred embodiment of the present invention has been chosen for purposes of illustration and description and is shown in the accompanying drawings, forming a part of the specification, wherein:

In the illustration,

FIG. 1 is a frontal view of one embodiment of the device in the present invention, partly cut off, and in a cross section on the upper half shown at the 11 line appearing in the FIG. 2;

FIG. 2 is the cross section at the in the FIG. 1;

FIG. 3 is the cross section at the 3-3 line appearing in the FIG. 1;

FIG. 4 is the outer drum obliquely shown when the two segments are removed;

FIG. 5 is the partial longitudinal section of another embodiment, corresponding to the cross section at the 5-5 line in FIG. 6;

FIG. 6 is the cross section at the 6-49 line in the FIG. 5;

FIG. 7 indicates a view where a cleaning or scavenging device is applied to the doifing device and the pressure rollers and also where another type of cleaning device is applied in place of that shown in FIG. 2;

FIG. 8 represents a frontal view of that shown in FIG. 7;

FIG. 9 shows a view where a modified cleaning device is applied in place of that shown in FIG. 7; and

FIG. 10 illustrates a frontal view of that shown in FIG. 9.

In the FIGS. 1, 2, 3 and 4, 11 is an outer drum rotatably mounted between the lateral plate 12 and another lateral plate 12, and consisting of eight transverse segments 14, forming eight elongate slits 15, each being fixed by set screw 13 onto the lateral plates 12, 12, and also being rotatably supported by machine frames 17, 17 which enter two laterally situated holes 16, 16 in the plates 12.

The outer drum 11 is arranged in contact with the rotatable fibre transferring cylinder 19 on which the fibres are deposited and from which they are to be removed.

Further, an inner shaft or drum 20 is rotatably fixed by an axle 0n the inside of the outer drum 1i, and the revolving center lines 21 and 22 of the outer drum 11 and the inner shaft or drum 20 respectively lie in parallel, but the center line 22 of the inner shaft or drum 20 lies nearer to the fibre transferring cylinder 19 than that 21 of the outer drum 11. That is, the outer drum 11 lies eccentrically in relation to the inner shaft or drum 20. The elongate slits 15 are disposed on the peripheral surface of the outer drum 11 and extend along the axis thereof. The wall thickness of the drum 11 is a little greater than the minimum distance between the two center lines 21, 22, at the position of the elongate slits. On the peripheral surface of the inner shaft or drum 20 are dofling plates 23 having many sawteeth-like denticulations 34, plates 23 being mounted in place by insertion bars 24. The positions and numbers of the said dofiing plates 23 correspond to the elongate slits 15 of the outer drum l1, and each dofiing plate 23 is slidably inserted in one of the elongate slits 15.

The outer drum 11, in parallel with the fibre transferring cylinder 19 on which the fibres 18 are dolfed, rests on the frame 17 in near contact with the cylinder.

Each dofling plate 23 is fixed to a cylindrical insertion bar 24 by a set screw 25, and each bar 24 slidably enters a groove 26 formed in the inner shaft or drum 20. The insertion bar 24 fits loosely in the groove 26 to act as a fulcrum.

Each lateral plate 12 is octagonal-shaped and is provided with an axially inwardly projecting partition 27, and between the partitions 27, 27, both ends of a segment are fixed by set screws 13.

A knife 28 is fixed on the frame 17 to lightly touch on the surface of the outer drum 11 with its tip end. A guide plate 29 serves to transfer fibres to a pair of pressure rollers 30. 31 is a felt roller, with its surface being 22 line appearing covered by felt.

A plurality of rotary guide sticks or bars 32 is fixed perpendicularly on the inner shaft or drum 20 to be loosely inserted into guide grooves 33 formed in plates 12, as is shown in FIGS. 1, 2 and 3. Therefore, the outer drum 11 jointly rotates by pushing action of the rotary guide sticks 32 when the inner shaft or drum 20 is driven by a driving gear (not shown in the drawings), etc. At the same time, the fibre transferring cylinder 19 rotates in a direction indicated by arrow 11, while the drum 11 rotates in a direction indicated by arrow [1.

The fibres flow in a direction indicated by arrow while the pressure rollers 30, 30, run in directions shown by arrows d and e.

While the inner shaft or drum 20 rotates about its axis on the center line 22, the outer drum 11 also rotates with its axis on the center line 21. During this action the tips or edges of the doffing plates 23 that are mounted on the shaft 20 are projected outside of the elongate slits 15 as the doffing plates. 23 come close to the fibre transferring cylinder 19; and as the plates recede from the cylinder 19, the ends of the plates sink into the slits 15.

By this action of the dofiing plates 23, the fibres 18 deposited on the said cylinder 19 are removed by the sawteeth-shaped teeth 34 of the doffing plates 23, and the removed fibres 18 after coming off the saw-teeth 34 of the dofiing plates 23 and the outer drum 11, are sent on the guide plate 29, and then to the pressure rollers 30, 30 along the guide plate 29.

The fibres 18 that are left behind sticking on the outer drum 11 are removed by a knife 28; those still remaining are removed by the felt roller 31.

In the embodiment shown in the FIGS. and 6, performance and effects are generally similar to the abovernentioned embodiment except that a cylindrical drum 36 having elongate slits is used instead of the said outer drum 11 and that the outer drum 11 is fixed on the frame 17 by means of roller bearings 35. As a result, the majority of the reference numerals'appearing in FIGS. 5 and 6 is similarly applied to the aforesaid embodiment.

In the embodiment shown in FIGS. 7 and 8, the knife 28 and the felt roller 31 which have been earlier described are removed and knife holders 39, 40 that are pivoted by pivots 51, 52 to move freely and are fixed on knives 37, 38 respectively. There is also provided supporting bars 41, 42, a tension spring 43, a dust accumulator having two dust inlets 44, 45, a dust accumulator 48 having an inlet 47 and dust pipes 49, 50. The majority of the previous reference numerals in the drawings similarly apply to the aforesaid embodiment.

The fibres and impurities staying on the pressure rollers 30, 30 are taken off by the knives 37, 38, suctioned in by inlets 45, 47 and then sent to a dust collection box through dust accumulators 46, 48 and dust pipes 49, 50. The fibres and impurities staying on the outer drum 11 and the doffing plate 23 are also suctioned in through the inlet 44. The knives 37, 38 tightly contact with the pressure rollers 30, 30, by means of the force of spring 43; when the ends of knives 37, 38 are lifted overcoming the force of spring 43, the fibres and impurities sandwiched between the knives 37, 38 and the pressure rollers 39, 39 are easily suctioned in.

In the embodiment illustrated in FIGS. 9 and 10, the inlet of dust accumulator 46, as compared with that shown in FIGS. 7 and 8, is widened as seen in the inlet 53, the performance and effects are much like.

In the said explanations, it seems clear how useful the present invention is for the doffing device, and the form and structure of the device and the readjustment of the parts, etc. can be changed within the scope that the object 5. and performance of the present invention are not impaired. Because of this, the present invention is not confined to the illustrations and descriptions already made.

The invention is claimed as follows:

1. A textile machine comprising: a rotatable cylinder adapted to carry a plurality of fibres to be doffed on its surface; a rotatable drum aligned with its axis substantially parallel to the axis of said cylinder, said drum having a plurality of transverse, arcuately spaced, elongate slits; a doifing member aligned with each of said slits; operating means connected to said doffing members for periodically extending said members through said slits and toward said cylinder whereby to doff said fibres and for periodically retracting said members generally inwardly of said drum to clean waste material from said members, including a rotatably driven shaft residing eccentrically within said drum; slidably interfitting means, including cooperating guide bars and receiving grooves, coupling said shaft and said drum whereby to drive said drum from said shaft; upper and lower, closely disposed, pressure rollers spaced from said cylinder and said drum to receive doffed fibres from said members; first and second scraper knives associated respectively with said upper and lower pressure rollers; mounting means for pivoting said scraper knives into cleanable contact with substantially the entire length of the associated pressure rollers, including a mounting arrangement for situating said first scraper knife substantially in the space between said upper pressure roller and said drum; and suction-type waste material removal means, including first and second accumulator members associated respectively with said first and second scraper knives, said second accumulator member having suction inlet means opening along the length of said second scraper knife and said first accumulator member having suction inlet means opening along the length of said first knife and along the length of said drum at the retracted position of said doffing members, whereby waste material is removed from the surface of said drum adjacent said slits and from said pressure rollers at said scraper knives.

2. A textile machine according to claim 1 wherein the suction inlet of said first accumulator member has separate openings for said drum and said first knife.

3. A textile machine according to claim 1 wherein the suction inlet of said first accumulator member has a single opening serving both said drum and said first knife.

References Cited UNITED STATES PATENTS 1,070 of 1863 1,570 of 1862 1,830 of 1862 2,691 of 1862 916,817 1/1963 Great Britain. Great Britain. Great Britain. Great Britain. Great Britain.

MERVIN STEIN, Primary Examiner. D

D. NEWTON, Assistant Examinerv 

1. A TEXTILE MACHINE COMPRISING: A ROTATABLE CYLINDER ADAPTED TO CARRY A PLURALITY OF FIBRES TO BE DOFFED ON ITS SURFACE; A ROTATABLE DRUM ALIGNED WITH ITS AXIS SUBSTANTIALLY PARALLEL TO THE AXIS OF SAID CYLINDER, SAID DRUM HAVING A PLURALITY OF TRANSVERSE, ARCUATELY SPACED, ELONGATE SLITS; A DOFFING MEMBER ALIGNED WITH EACH OF SAID SLITS; OPERATING MEANS CONNECTED TO SAID DOFFING MEMBERS FOR PERIODICALLY EXTENDING SAID MEMBERS THROUGH SAID SLITS AND TOWARD SAID CYLINDER WHEREBY TO DOFF SAID FIBRES AND FOR PERIODICALLY RETRACTING SAID MEMBERS GENERALLY INWARDLY OF SAID DRUM TO CLEAN WASTE MATERIAL FROM SAID MEMBERS, INCLUDING A ROTATABLY DRIVEN SHAFT RESIDING ECCENTRICALLY WITHIN SAID DRUM; SLIDABLY INTERFITTING MEANS, INCLUDING COOPERATING GUIDE BARS AND RECEIVING GROOVES, COUPLING SAID SHAFT AND SAID DRUM WHEREBY TO DRIVE SAID DRUM FROM SAID SHAFT; UPPER AND LOWER, CLOSELY DISPOSED, PRESSURE ROLLERS SPACED FROM SAID CYLINDER AND SIAD DRUM TO RECEIVE DOFFED FIBRES FROM SAID MEMBERS; FIRST AND SECOND SCRAPER KNIVES ASSOCIATED RESPECTIVELY WITH SAID UPPER AND LOWER PRESSURE ROLLERS; MOUNTING MEANS FOR PIVOTING SAID SCRAPER KNIVES INTO CLEANABLE CONTACT WITH SUBSTANTIALLY THE ENTIRE LENGTH OF THE ASSOCIATED PRESSURE ROLLERS, INCLUDING A MOUNTING ARRANGEMENT FOR SITUATING SAID FIRST SCRAPER KNIFE SUBSTANTIALLY IN THE SPACE BETWEEN SAID UPPER PRESSURE ROLLER AND SAID DRUM; AND SUCTION-TYPE WASTE MATERIAL REMOVAL MEANS, INCLUDING FIRST AND SECOND ACCUMULATOR MEMBERS ASSOCIATED RESPECTIVELY WITH SAID FIRST AND SECOND SCRAPER KNIVES, SAID SECOND ACCUMULATOR MEM- 